Private image cropping and optimisation

Crop images online and reduce file size

Crop up to 25 JPEG, PNG or WebP images to a standard or custom aspect ratio. Choose the focus position, keep the input format and optimise every output directly in your browser.

25images per batch25MBmaximum per image9focus positions

Crop and optimise together

Remove unwanted edges and reduce encoding weight together

Choose one ratio for a consistent batch and decide which area should remain visible. ImageOptimise removes the excess edges and then applies the approved codec for the original format.

Useful ratio presets

Choose Square, 4:3, 3:2, 16:9 or 9:16, or enter a custom ratio from 1:1 to 100:100.

Nine focus positions

Protect the top, centre, bottom, left or right area instead of applying a blind centre crop to every image.

No stretching

Cropping removes pixels from the edges without distorting faces, products, graphics or screenshots.

Optimised downloads

The cropped result keeps its JPEG, PNG or WebP format and is re-encoded with the approved optimisation settings.

How to crop an image

Choose, add and download in three steps

Settings lock while a batch is active, so every image follows the same crop rule.

Choose ratio and focus

Select a standard or custom crop ratio, then choose which part of every image should remain visible.

Add up to 25 images

Drag supported files into the tool or browse your device. Cropping and optimisation begin automatically.

Review and download

Check original and output dimensions, file sizes and the genuine size change, then download individually or as one ZIP.

Format-aware output

Crop JPEG, PNG and WebP without changing format

The crop tool keeps the source format and re-encodes the selected native-resolution area with a suitable codec. This protects transparency where the input format supports it.

JPG

Crop JPEG photographs

JPEG output uses progressive MozJPEG quality 77 after cropping, providing the same tested visual-quality and file-size balance as the approved compressor.

PNG

Crop PNG graphics

PNG output remains lossless at its new dimensions. Transparent pixels are preserved and the generated PNG is processed with OxiPNG.

WEBP

Crop WebP images

WebP output uses libwebp quality 80 with full alpha quality, supporting photographs, graphics and transparent content.

Dimensions, quality and file size

Cropping can make images much lighter

Cropping changes composition by removing pixels outside the chosen ratio. A wide photograph cropped to a square can remove a substantial part of the original pixel area, while an image already close to the selected ratio may change only slightly.

ImageOptimise keeps the selected crop at native pixel resolution and then uses format-specific encoding. The focus position controls which edge is removed first. Results vary by source ratio, chosen ratio, image detail and source encoding.

Keep original master files separately. Review important cropped images before replacing production assets, especially where exact print dimensions, colour profiles or metadata matter.

Current optimiser safeguards

The selected output ratio is applied without stretching.

The chosen focus position controls which area remains visible.

The original JPEG, PNG or WebP format is retained.

File-size changes are reported honestly, including an unusual larger result.

Practical cropping

Create consistent image shapes for digital use

A consistent aspect ratio makes galleries, cards, campaigns and product grids easier to design without browser-side clipping.

Social media graphics

Create square, landscape or portrait crops while choosing where the important subject remains.

Product catalogues

Standardise product-image ratios so catalogue grids align cleanly across mixed source photography.

Email campaigns

Prepare campaign images to one consistent shape before adding them to an email platform.

Website cards

Crop article and service images to predictable card ratios without relying on CSS clipping.

Portfolio previews

Create consistent display copies while retaining separate original master files.

Batch handovers

Apply one ratio and focus rule to a mixed batch and download every result together.

Private in-browser cropping

Your image files stay in the current tab

The browser decodes, crops and re-encodes supported images on your device. Image bytes, filenames and crop settings are not sent to an ImageOptimise image-processing server.

No account or image upload endpoint is required.
Each browser tab has an independent temporary batch and settings.
Different devices on the same network cannot see one another’s images.
Clear All or close the tab to end the temporary session.

Read our privacy approach

Image crop questions

Frequently asked questions

Important details about ratios, focus position, optimisation and privacy.

Are cropped images also optimised?＋

Yes. After high-quality cropping, JPEG uses MozJPEG quality 77, PNG uses lossless OxiPNG processing and WebP uses libwebp quality 80 with full alpha quality.

Does cropping stretch an image?＋

No. The tool removes excess pixels from the edges to reach the chosen aspect ratio. It does not stretch or upscale the selected area.

Can I use a custom crop ratio?＋

Yes. Choose Custom and enter whole-number width and height ratio values from 1 to 100, such as 5:4 or 21:9.

How does the focus position work?＋

The nine-position grid decides which area remains visible when pixels must be removed. For example, Top centre protects the upper middle area, while Centre removes edges evenly.

Will PNG and WebP transparency remain?＋

Yes. Transparent content remains supported when cropping PNG and WebP images. JPEG inputs remain JPEG and do not contain transparency.

Will every cropped image be smaller?＋

Most meaningful reductions in dimensions will also reduce file size, but results depend on the source and format. Any larger result is reported honestly rather than described as a saving.

What if an image already has the selected ratio?＋

No edge pixels need to be removed. The image still passes through the approved optimisation path, and the original is retained if the candidate is not smaller.

How many images can I crop?＋

You can process up to 25 JPEG, PNG or WebP images per batch, with a maximum individual file size of 25MB.

Choose your crop

Crop and optimise your next image batch

Select a ratio and focus position, then add up to 25 images from your device.

Crop images now